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71.
A procedure was developed to obtain three size fractions (2360 < d(p) < 1000, 1000 < d(p) < 710, and 710 < d(p) < 425 microm) of stable aggregates from Koopveen peat soil by application of an intense mixing regime prior to sieving of the soil material. The organic matter content, aggregation structure and the microstructure of these aggregates were determined and the particles were artificially contaminated with naphthalene and phenanthrene via a solvent phase. A nonlinear Freundlich sorption isotherm was determined for the naphthalene contaminated soil aggregates (n = 0.39; K(F) = 1.13 x 10(-2) m(1.17) kg(-0.39)). The applicability of a mathematical model, that describes sorption equilibrium, intraparticle mass-transfer, and nonlinear bacterial degradation kinetics, was tested by fitting results of dynamic desorption and biodegradation experiments, generated in this study and earlier work on the peat soil aggregates. The experimental data were described adequately although strong variations in the values of the fit parameter, the intra-particle porosity (0.30 < epsilon < 0.88), were found. This indicates the necessity of further investigations. 相似文献
72.
Dong Yue Yang Jin-Ling Zhao Xiao-Rui Yang Shun-Hua Mulder Jan Dörsch Peter Zhang Gan-Lin 《Environmental science and pollution research international》2022,29(14):20186-20199
Environmental Science and Pollution Research - Nitrate (NO3?) loss and enrichment in water bodies caused by fertilization are a major environmental problem in agricultural areas. However, the... 相似文献